Cylchgronau Cymru
Chwiliwch trwy dros 450 o deitlau a 1.2 miliwn o dudalennau
Abbreviations: BBCS Bulletin of the Board of Celtic Studies BL British Library CRO County Record Office PRO Public Record Office PRO Seals Roger Ellis, Catalogue of Seals in the Public Record Office, Personal Seals, n (London, 1981) S S single matrix, single parchment tag. WG 1 P.C. Bartrum, Welsh Genealogies A.D.300-1400 (8 vols, Cardiff, 1974).